<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            position: absolute;
            width: 100px;
            height: 100px;
            background-color: pink;
        }
    </style>
    <script src="./js/animate.js"></script>
    <script>
        document.addEventListener('DOMContentLoaded', function() {
            const box = document.querySelector('.box');
            // 调用缓动动画函数，移动盒子距离左侧 500 像素;
            animate(box, 500);
        });
    </script>
</head>
<body>
    <div class="box"></div>
</body>
</html>